1 files changed, 65 insertions, 0 deletions
diff --git a/spec/support/shared_examples/services/boards/items_list_service_shared_examples.rb b/spec/support/shared_examples/services/boards/items_list_service_shared_examples.rb
new file mode 100644
index 00000000000..9a3a0cc9cc8
--- /dev/null
+++ b/spec/support/shared_examples/services/boards/items_list_service_shared_examples.rb
@@ -0,0 +1,65 @@
+# frozen_string_literal: true
+
+RSpec.shared_examples 'items list service' do
+  it 'avoids N+1' do
+    params = { board_id: board.id }
+    control = ActiveRecord::QueryRecorder.new { described_class.new(parent, user, params).execute }
+
+    new_list
+
+    expect { described_class.new(parent, user, params).execute }.not_to exceed_query_limit(control)
+  end
+
+  it 'returns opened items when list_id is missing' do
+    params = { board_id: board.id }
+
+    items = described_class.new(parent, user, params).execute
+
+    expect(items).to match_array(backlog_items)
+  end
+
+  it 'returns opened items when listing items from Backlog' do
+    params = { board_id: board.id, id: backlog.id }
+
+    items = described_class.new(parent, user, params).execute
+
+    expect(items).to match_array(backlog_items)
+  end
+
+  it 'returns opened items that have label list applied when listing items from a label list' do
+    params = { board_id: board.id, id: list1.id }
+
+    items = described_class.new(parent, user, params).execute
+
+    expect(items).to match_array(list1_items)
+  end
+
+  it 'returns closed items when listing items from Closed sorted by closed_at in descending order' do
+    params = { board_id: board.id, id: closed.id }
+
+    items = described_class.new(parent, user, params).execute
+
+    expect(items).to eq(closed_items)
+  end
+
+  it 'raises an error if the list does not belong to the board' do
+    list = create(list_factory) # rubocop:disable Rails/SaveBang
+    service = described_class.new(parent, user, board_id: board.id, id: list.id)
+
+    expect { service.execute }.to raise_error(ActiveRecord::RecordNotFound)
+  end
+
+  it 'raises an error if list id is invalid' do
+    service = described_class.new(parent, user, board_id: board.id, id: nil)
+
+    expect { service.execute }.to raise_error(ActiveRecord::RecordNotFound)
+  end
+
+  it 'returns items from all lists if :all_list is used' do
+    params = { board_id: board.id, all_lists: true }
+
+    items = described_class.new(parent, user, params).execute
+
+    expect(items).to match_array(all_items)
+  end
+end